Aquarium Air Stone 4–10cm Round Bubble Aerator | Fish Tank

Round Aquarium Air Stone – Boost Oxygen & Create Beautiful Bubbles

Keep your fish thriving with this durable round aquarium bubble air stone. Available in four sizes (4cm, 6cm, 8cm, and 10cm), this aerator diffuses a steady stream of fine bubbles throughout your fish tank or hydroponic system, increasing dissolved oxygen levels, lowering CO₂, and helping maintain a healthy pH balance. Made in Mainland China.

Key Features

• Four Size Options: Choose from 4cm (1.57"), 6cm (2.36"), 8cm (3.15"), or 10cm (3.94") to fit any tank size.
• High-Temperature Sintered Construction: Made from hard gold steel sand, sintered at high temperatures for superior durability compared to standard air stones.
• Boosts Water Quality: Increases oxygen levels, lowers CO₂, and helps raise pH for a healthier aquatic environment.
• Creates Stunning Visual Effects: Produces cascading bubbles that generate gentle water currents and dazzling underwater scenes.
• Reusable & Washable: Simply rinse and reuse — if bubble output reduces over time, remove and wash thoroughly to restore full performance.
• Universal Tubing Compatibility: Fits standard 4mm (0.16") or 8mm (0.31") soft air tubing — works with most aquarium air pumps.
• Hydroponic Ready: Excellent oxygen plate for hydroponic systems as well as standard fish and aquatic plant tanks.
• Easy to Use: Simply soak in water for 15 minutes before first use, connect to your air pump tubing, and drop into the tank.

Specifications

Usage Tips

• Soak the air stone in clean water for at least 15 minutes before first use to prime the pores.
• For long-term maintenance, if bubble output decreases due to debris build-up, remove and rinse repeatedly under clean water.
• The air stone is fully reusable — simply clean and reinstall as needed.

Package Contents

1 × Aquarium Bubble Air Stone (size of your choice)

Explore More for Your Pets & Home

Looking for more accessories? Check out our Pet Food & Water Feeder Bowl for your furry friends, or organize your aquarium accessories with our Portable Tool Storage Bag.

Learn more: U.S. Fish and Wildlife Service

Frequently Asked Questions

Q: What size aquarium air stone should I choose for my fish tank?

A: The right size depends on your tank's volume. The 4cm air stone suits small nano tanks (up to ~20L), the 6cm works well for medium tanks (20–60L), while the 8cm and 10cm bubble stones are ideal for larger aquariums (60L+) or hydroponic setups. Larger stones distribute more bubbles and oxygenate a greater water volume.

Q: Do I need a specific air pump to use this aquarium bubble stone?

A: No special pump is required. This air stone is compatible with most standard aquarium air pumps — simply connect it using 4mm or 8mm inner-diameter soft tubing (sold separately). Make sure your pump's output matches your tank size for optimal bubble flow.

Q: How do I clean and maintain the air stone?

A: If you notice a reduction in bubble output, remove the air stone from the tank and rinse it thoroughly under clean running water, gently working debris loose. Repeat as needed. The sintered construction means this bubble stone is fully washable and reusable, making it a long-lasting and cost-effective aquarium accessory.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.